Outer surface of a crank handle



FIG. 1 is a top front perspective view of an outer surface of a crank handle embodying our design in accordance with the present invention;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is an end elevational view thereof; and,

FIG. 5 is an opposite end elevational view thereof. 

The ornamental design for an outer surface of a crank handle, as shown and described. 